Marion had some money. If she buys 5 chocolate bars, she will have $7 left. If she buys 8 chocolate bars, she will have $1 left.
- How much does each chocolate bar cost?
- How much money does she have?
(a)
Let 1 C be the price of 1 chocolate bar.
5 C + 7 = 8 C + 1
8 C - 5 C = 7 - 1
3 C = 6
1 C = 6 ÷ 3 = 2
Cost of each chocolate bar = $2
(b)
Total amount that Marion had
= 8 x 2 + 1
= 16 + 1
= $17
Answer(s): (a) $2; (b) $17